25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=

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25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=

25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=
25(x+y)^2+16(x-y)^2=
4y(y-x)^2-6y(x-y)^3=
(a-2b)^2+(a-2b)+1/4=

25(x+y)^2+16(x-y)^2=4y(y-x)^2-6y(x-y)^3=(a-2b)^2+(a-2b)+1/4=
1
25(x+y)^2+16(x-y)^2
=25(x^+2xy+y^)+16(x^-2xy+y^)
=25x^+50xy+25y^+16x^-32xy+16y^
=41x^+18xy+41y^
2
4y(y-x)^2-6y(x-y)^3
=4y(y^-2xy+x^)-6y(x^3-3x^y+3xy^-y^3)
=4y^3-8xy^+4x^y-6x^3y+18x^y^-18xy^3+6y^4
3
(a-2b)^2+(a-2b)+1/4
=a^-4ab+4b^+a-2b+1/4

1、 =25（x^2+2xy+y^2）+16(x^2-2xy+y^2)
=25x^2+50xy+25y^2+16x^2-32xy+16y^2
=41x^2+18xy+41y^2

25xx+50xy+25yy+16xx-32xy+16yy
41xx+18xy+41yy
4yyy-8yxy+4yxx-(6y[xxx-3xxy+3xyy-yyy])
4yyy-8xyy+4xxy-6xxxy+18xxyy-18xyyy+6yyyy
aa-4ab+4bb+a-2b+1/4
看得懂吧

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 (12-2x)/X=(-16-2Y)/Y X^2+Y^2=25 Y 已知x^2+y^2-16x-8y+25=0,求y/x-x/y的值 已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? （x+y）^2-z^=a^2-(b-c)^2=(x-y)^3-x+y=16(x+y)^2-25(x-y)^2= 填空：x-y/x+y=( )/x^2-y^2 （x-y)2•(y-x)³(x-y)=? y+y'-2y=2x 微分方程y - 2y' + y = x (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 化简y(x+y)+(x+y)(x-y)-x^2 (x+y)^2-16(x-y)^2 (x+y)^2-16(x-y)^2 16-8（x-y)+(x-y)2 (x-4y)(2x+y)= (x+y)(2x-3y)=?